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Old 04-14-2013, 01:52 AM
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mikesnyhere mikesnyhere is offline
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I used a 270 adv duration with 9.1 to comp. ratio it worked really well on a ported 302 . I would hesitate to use it on anything less than 8.8 . what is recommended ? the 268 is a high energy Crane ? their recommended specs should tell you a recommended CR , and if new springs are needed . best to look at what the cam manufactures suggests .

Last edited by mikesnyhere; 04-14-2013 at 02:01 AM.
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